| 1st | 31 | Nasr / Conway / Curran / Middleton | Cadillac DPi-V.R | Whelen Engineering Racing | 1 | 1:35.806 | 215.2720 | 1st | P |
| 2nd | 90 | Cheever / McMurry / Vautier | Cadillac DPi-V.R | Spirit of Daytona Racing | 1 | 1:36.037 | 214.7540 | 2nd | P |
| 3rd | 5 | Albuquerque / Fittipaldi / Barbosa | Cadillac DPi-V.R | Mustang Sampling Racing | 1 | 1:36.135 | 214.5350 | 3rd | P |
| 4th | 10 | van der Zande / Taylor / Hunter-Reay | Cadillac DPi-V.R | Konica Minolta Cadillac DPi-V.R | 1 | 1:36.481 | 213.7660 | 4th | P |
| 5th | 6 | Montoya / Cameron / Pagenaud | Acura ARX-05 | Acura Team Penske | 1 | 1:36.988 | 212.6470 | 5th | P |
| 6th | 7 | Taylor / Castroneves / Rahal | Acura ARX-05 | Acura Team Penske | 1 | 1:37.231 | 212.1160 | 6th | P |
| 7th | 22 | Derani / Lapierre / Van Overbeek | Nissan Onroak DPi | Tequila Patron ESM | 1 | 1:37.245 | 212.0860 | 7th | P |
| 8th | 55 | Tincknell / Bomarito / Pigot | Mazda RT24-P | Mazda Team Joest | 1 | 1:37.263 | 212.0470 | 8th | P |
| 9th | 78 | Brundle / Felix da Costa / Habsburg / Tung | Oreca 07 Gibson | Jackie Chan DCR Jota | 1 | 1:37.274 | 212.0230 | 9th | P |
| 10th | 54 | Braun / Dumas / Duval / Bennett | Oreca 07 Gibson | CORE autosport | 1 | 1:37.303 | 211.9600 | 10th | P |
| 11th | 85 | Trummer / Cindric / DeFrancesco / Alon | Oreca 07 Gibson | JDC-Miller Motorsports | 1 | 1:37.323 | 211.9170 | 11th | P |
| 12th | 99 | Simpson / Menezes / Miller / Goikhberg | Oreca 07 Gibson | JDC-Miller Motorsports | 1 | 1:37.331 | 211.8990 | 12th | P |
| 13th | 38 | O'Ward / Masson / French | Oreca 07 Gibson | Performance Tech Motorsports | 1 | 1:37.496 | 211.5400 | 13th | P |
| 14th | 23 | Alonso / Norris / Hanson | Ligier JS P217 Gibson | United Autosports | 1 | 1:37.515 | 211.4980 | 14th | P |
| 15th | 2 | Pla / Dalziel / Sharp | Nissan Onroak DPi | Tequila Patron ESM | 1 | 1:37.525 | 211.4780 | 15th | P |
| 16th | 37 | Stroll / Juncadella / Frijns / Rosenqvist | Oreca 07 Gibson | Jackie Chan DCR Jota | 1 | 1:37.604 | 211.3050 | 16th | P |
| 17th | 32 | Senna / de Sadeleer / di Resta / Owen | Ligier JS P217 Gibson | United Autosports | 1 | 1:37.779 | 210.9270 | 17th | P |
| 18th | 77 | Jarvis / Rast / Nunez | Mazda RT24-P | Mazda Team Joest | 1 | 1:37.888 | 210.6940 | 18th | P |
| 19th | 52 | Saavedra / Yacaman / Gonzalez / Boulle | Ligier JS P217 Gibson | AFS/PR1 Mathiasen Motorsports | 1 | 1:37.905 | 210.6570 | 19th | P |
| 20th | 20 | Miller / Cullen / Drumwright | Riley Mk.30 Gibson | BAR1 Motorsports | 1 | 1:39.920 | 206.4080 | 20th | P |
| 21st | 66 | Hand / Bourdais / Müller | Ford GT | Ford Chip Ganassi Racing | 1 | 1:43.610 | 199.0570 | 1st | GTLM |
| 22nd | 4 | Gavin / Fässler / Milner | Chevrolet Corvette C7.R | Corvette Racing | 1 | 1:43.640 | 199.0000 | 2nd | GTLM |
| 23rd | 67 | Briscoe / Westbrook / Dixon | Ford GT | Ford Chip Ganassi Racing | 1 | 1:43.714 | 198.8570 | 3rd | GTLM |
| 24th | 912 | Bamber / Vanthoor / Bruni | Porsche 991 RSR | Porsche GT Team | 1 | 1:43.888 | 198.5240 | 4th | GTLM |
| 25th | 3 | Garcia / Magnussen / Rockenfeller | Chevrolet Corvette C7.R | Corvette Racing | 1 | 1:43.998 | 198.3150 | 5th | GTLM |
| 26th | 62 | Alessandro Pier Guidi | Ferrari 488 GTE | Risi Competizione | 1 | 1:44.037 | 198.2410 | 6th | GTLM |
| 27th | 911 | Tandy / Makowiecki / Pilet | Porsche 991 RSR | Porsche GT Team | 1 | 1:44.141 | 198.0430 | 7th | GTLM |
| 28th | 25 | Sims / Eng / Auberlen / De Phillippi / Herta | BMW M8 GTLM | BMW Team RLL | 1 | 1:45.056 | 196.3170 | 8th | GTLM |
| 29th | 24 | Farfus / Catsburg / Krohn / Edwards / Herta | BMW M8 GTLM | BMW Team RLL | 1 | 1:45.551 | 195.3970 | 9th | GTLM |
| 30th | 11 | Ineichen / Perera / Bortolotti / Breukers | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1 | 1:47.104 | 192.5630 | 1st | GTD |
| 31st | 59 | Cairoli / Müller / Walls / Proczyk / Smith | Porsche 991 GT3 R | Manthey-Racing | 1 | 1:47.125 | 192.5260 | 2nd | GTD |
| 32nd | 19 | van Splunteren / Pérez Companc / Engelhart / Machiels / Lenz | Lamborghini Huracán GT3 | GRT Grasser Racing Team | 1 | 1:47.364 | 192.0980 | 3rd | GTD |
| 33rd | 29 | van der Linde / Schmidt / van der Linde / Mies | Audi R8 LMS GT3 | Montaplast by Land-Motorsport | 1 | 1:47.388 | 192.0540 | 4th | GTD |
| 34th | 93 | Aschenbach / Farnbacher / Ledogar / Marks | Acura NSX GT3 | Michael Shank Racing | 1 | 1:47.425 | 191.9880 | 5th | GTD |
| 35th | 44 | Lally / Winkelhock / Potter / Davis | Audi R8 LMS GT3 | Magnus Racing | 1 | 1:47.436 | 191.9690 | 6th | GTD |
| 36th | 58 | Long / Renauer / Jaminet / Nielsen | Porsche 991 GT3 R | Wright Motorsports | 1 | 1:47.481 | 191.8890 | 7th | GTD |
| 37th | 14 | Marcelli / Baumann / Junqueira | Lexus RCF GT3 | 3GT Racing | 1 | 1:47.496 | 191.8610 | 8th | GTD |
| 38th | 73 | Lindsey / Bergmeister / Pappas | Porsche 991 GT3 R | Park Place Motorsports | 1 | 1:47.537 | 191.7890 | 9th | GTD |
| 39th | 48 | Sellers / Caldarelli / Snow / Miller | Lamborghini Huracán GT3 | Paul Miller Racing | 1 | 1:47.570 | 191.7290 | 10th | GTD |
| 40th | 15 | Hawksworth / Farnbacher / Pruett / Heinemeier Hansson | Lexus RCF GT3 | 3GT Racing | 1 | 1:47.590 | 191.6940 | 11th | GTD |
| 41st | 86 | Parente / Allmendinger / Hindman / Legge | Acura NSX GT3 | Michael Shank Racing | 1 | 1:47.605 | 191.6660 | 12th | GTD |
| 42nd | 33 | Bleekemolen / Christodoulou / Keating / Stolz | Mercedes-AMG GT3 | Mercedes-AMG Team Riley Motorsports | 1 | 1:47.652 | 191.5830 | 13th | GTD |
| 43rd | 69 | Eversley / Rayhall / Falb / Gilsinger | Acura NSX GT3 | HART | 1 | 1:47.665 | 191.5600 | 14th | GTD |
| 44th | 63 | Balzan / Segal / Jeannette / MacNeil | Ferrari 488 GT3 | Scuderia Corsa | 1 | 1:47.726 | 191.4510 | 15th | GTD |
| 45th | 51 | Serra / Lamy / Lauda / Dalla Lana | Ferrari 488 GT3 | Spirit of Race | 1 | 1:47.752 | 191.4060 | 16th | GTD |
| 46th | 96 | Klingmann / Kvamme / Yount | BMW M6 GT3 | Turner Motorsport | 1 | 1:47.770 | 191.3740 | 17th | GTD |
| 47th | 82 | Molina / Fuentes / Pérez de Lara / Creel | Ferrari 488 GT3 | Risi Competizione | 1 | 1:47.814 | 191.2950 | 18th | GTD |
| 48th | 75 | Engel / Jäger / Grenier / Habul | Mercedes-AMG GT3 | SunEnergy1 Racing | 1 | 1:47.912 | 191.1210 | 19th | GTD |
| 49th | 64 | Bell / Montecalvo / Sweedler / Bird | Ferrari 488 GT3 | Scuderia Corsa | 1 | 1:48.042 | 190.8920 | 20th | GTD |
| 50th | 71 | Spinelli / Koch / Foley / Perez | Mercedes-AMG GT3 | P1 Motorsports | 1 | 1:48.094 | 190.7990 | 21st | GTD |